Nut-lock.



W. G. SCHUMPERT.

NUT LOCK.

APPLIOATION FILED JUNE 17, 1910.

v976,701. v Patented N0v.22,19 10.

WILLIAM G. SCI-IUMPERT, OF CHATTANOOGA, OKLAHOMA.

NUT-LOCK.

Specification of Letters Patent.

Application filed June 17, 1910. Serial No. 567,469.

To all whom it may concern:

Be it known that I, VVILLIAM C. SOHUMP- nn'r, a citizen of the UnitedStates, residing at Chattanooga, in the county of Comanche and State ofOklahoma, have invented certain new and useful Improvements in Nut-IJOCkS; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to new and useful improvements in nut locks and myobject is to provide a mandrel, which is adapted to be forced intoengagement with the teeth of the bolt to hold the nut against rotationon the bolt, and, a further object is to provide means for forcing themandrel into engagement with the bolt.

Other objects and advantages will be hereinafter referred to and moreparticularly pointed out in the specification hereunto annexed.

In the accompanying drawings which are made a part of this application,Figure 1 is a plan view of the bolt showing the nut locked in positionthereon. Fig. 2 is a sectional view as seen on line 22 Fig. 1. Fig. 3 isa transverse sectional view through the nut and bolt, and, Fig. 4 is asimilar view of modified form of nut.

Referring to the drawin s in which si1nilar reference numerals designatecorresponding parts throughout the several views, 1 indicates a bolt,which may be constructed in any preferred manner and having threads 2 atone end thereof and 3 indicates a nut, which is adapted to be secured onto the threaded portion of the bolt. In order to hold the nut againstrotation on the bolt, an opening t is extended inwardly from one face ofthe nut and intersects the opening in the nut and through said openingis introduced a mandrel 5, the lower end of which is provided with apoint 6, which is adapted to be forced into the threads of the bolt. Themandrel is forced into engagement with the threads of the bolt by meansof a wedge 7 the edges of which are beveled to engage the beveled edges8 of a channel 9, said channel extending transversely of the nut fromedge to edge thereof. The side Walls of the channel are preferablytapered from one end to the other, as is also the wedge 7, so that whenthe wedge is first introduced into the slot, it may be raisedsufiiciently to extend over the upper end of the mandrel, which beforebeing forced into the threads, projects slightly above the bottom of thechannel. It will be seen, however, that as the wedge is forcedlengthwise through the channel, the beveled edge walls thereof willforce the wedge downwardly and drive the mandrel into the teeth, thussecurely locking the nut in position on the bolt.

I11 Figs. 1 to 3 of the drawings, I have shown the locking deviceapplied to a square nut, while in Fig. 4, I have shown the same appliedto a hexagonal nut, but it will be understood that it can be used inconnection with nuts having various contours.

In order to guard against the end of the wedge engaging the projectingportion of the mandrel, the end of the wedge coming in engagement withthe mandrel is preferably tapered on its under surface, as shown at 10,so that the wedge will readily ride over the mandrel, when the end ofthe wedge is moved into engagement therewith.

The point 6 of the mandrel is of sufficient width to extend intoengagement with two of the threads and the mandrel is of such lengththat, when forced downwardly its full distance, the point 6 will cut itsway into the threads and form a positive seat, thereby guarding againstany possibility of the nut rotating on the bolt until the wedge andmandrel have been removed therefrom.

What I claim is 1. In a nut lock, the combination with a bolt havingthreads at one end and a nut adapted to fit on said bolt, said nuthaving an opening therein, a channel extending transversely of the nutand intersecting said opening, the walls of said channel being taperedand gibbed, of a tapered wedge having its edges beveled to cooperatewith the gib of the channel, a mandrel having a pointed end adapted tobe seated in the opening of said nut, and a tapered portion formed onthe under face of one edge of said wedge, said tapered portion causingthe wedge to ride over the projecting end of the mandrel as said wedgeis moved inwardly and forcing the pointed end of said mandrel intoengagement with the threads of the bolt.

2. In a nutlock, the combination with a bolt having threads at one endand a nut adapted to fit on said bolt, said nut having an openingtherein, a channel extending Patented Nov. 22, 1910.

transversely of the nut and "intersecting said opening, of a Wedgehaving edges formed to slidably secure it in said channel, ;a mandrelhaving a pointed end adapted to be seated in the opening of the nut anda tapered portion formed on the under face of one of the free edges ofsaid Wedge, said tapered pori tion being adapted to rid over theproject- 7 ing end of the mandrel as said Wedge is moved inwardly andforce said mandrel into 10 engagement with the threads of said bolt.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

4 'VVILLIAM C. SCHUMPERT.

VVi-tnesses C. H. HOWARD, TOMMIE SCHUMPERT.

